var SCREEN_WIDTH = window.innerWidth;
    var SCREEN_HEIGHT = window.innerHeight;

    var container;

    var particle;

    var camera;
    var scene;
    var renderer;

    var mouseX = 0;
    var mouseY = 0;

    var windowHalfX = window.innerWidth / 2;
    var windowHalfY = window.innerHeight / 2;

    var particles = [];
    var particleImage = new Image();//THREE.ImageUtils.loadTexture( "img/ParticleSmoke.png" );
    particleImage.src = 'lxl/login/img/ParticleSmoke.png';



    function init() {

    container = document.createElement('div');
    //container = document.getElementById('casdiv');
    document.body.appendChild(container);

    camera = new THREE.PerspectiveCamera( 75, SCREEN_WIDTH / SCREEN_HEIGHT, 1, 10000 );
    camera.position.z = 1000;

    scene = new THREE.Scene();
    scene.add(camera);

    renderer = new THREE.CanvasRenderer();
    renderer.setSize(SCREEN_WIDTH, SCREEN_HEIGHT);
    var material = new THREE.ParticleBasicMaterial( { map: new THREE.Texture(particleImage) } );

    for (var i = 0; i < 3000; i++) {

    particle = new Particle3D( material);
    particle.position.x = Math.random() * 2000 - 1000;
    particle.position.y = Math.random() * 2000 - 1000;
    particle.position.z = Math.random() * 2000 - 1000;
    particle.scale.x = particle.scale.y =  1;
    scene.add( particle );

    particles.push(particle);
    }

    container.appendChild( renderer.domElement );


    document.addEventListener( 'mousemove', onDocumentMouseMove, false );
    document.addEventListener( 'touchstart', onDocumentTouchStart, false );
    document.addEventListener( 'touchmove', onDocumentTouchMove, false );

    setInterval( loop, 1000 / 60 );

    }

    function onDocumentMouseMove( event ) {

    mouseX = event.clientX - windowHalfX;
    mouseY = event.clientY - windowHalfY;
    }

    function onDocumentTouchStart( event ) {

    if ( event.touches.length == 1 ) {

    event.preventDefault();

    mouseX = event.touches[ 0 ].pageX - windowHalfX;
    mouseY = event.touches[ 0 ].pageY - windowHalfY;
    }
    }

    function onDocumentTouchMove( event ) {

    if ( event.touches.length == 1 ) {

    event.preventDefault();

    mouseX = event.touches[ 0 ].pageX - windowHalfX;
    mouseY = event.touches[ 0 ].pageY - windowHalfY;
    }
    }

    //

    function loop() {

    for(var i = 0; i<particles.length; i++)
    {

    var particle = particles[i];
    particle.updatePhysics();

    with(particle.position)
    {
    if(y<-1000) y+=2000;
    if(x>1000) x-=2000;
    else if(x<-1000) x+=2000;
    if(z>1000) z-=2000;
    else if(z<-1000) z+=2000;
    }
    }

    camera.position.x += ( mouseX - camera.position.x ) * 0.05;
    camera.position.y += ( - mouseY - camera.position.y ) * 0.05;
    camera.lookAt(scene.position);

    renderer.render( scene, camera );


    }